"New D-50 patch. I programmed partials U1 and U2 to be delayed behind L1 and L2 to give the echoing back effect. No PCMs were used.
Waveforms: Square with slight PWM and a saw WF.
There is a sight modulation of L1 and L2 as well to keep the sound moving while the upper partials catch up to the lower ones.
Subtractive synthesis is too much fun. :)
Please enjoy
:) TSF"